Fluid device



Jun 22, 1965 c. s. DAvlDs ETAL 3,190,227

FLUID DEVICE Filed Sept. 4, 1964 3 Sheets-Sheet 1 2 Caffe/Q0 di Q4 z//ag /Pcx/M/o /X fcmsfa' INVENTOR.

June 22, 1965 c. B. DAvIDs ETAL FLUID DEVICE 5 Sheets-Sheet 2 Filed Sept. 4I 1964 EN TOR.

June 22, 1955 c. a. DAvms Erm..

Filed Sept. 4, 1964 (2f/fop@ E /Poz/M/Q /2/ INVENTOR BY Rf LTA /ff/'o/ewfy United States Patent 3,1%,227 Bunn nnvicn Ciiiord B. DavidsyWoodland Hills, and Roland H.

Thorsell, Granada Hilis, Caiif., assiguors to The Marquai-dt Corporation, Van Nuys, Calif., a corporation of California Filed Sept. 4, 1964, Ser. No. 394,457 9 Claims. (Cl. 103-117) This invention relates to a fluid device usable either as a pump or as a uidvmotor and more particularly to such a device connected with an input or output member which requires no dynamic duid seal.

Certain fluids, such as cryogen fluid used in cryogenic Y drive member extending through the wall containing the pump or motor without the necessity of a dynamic seal. Thus, the driven member can be located external to the fluid systems and power conversion is obtained with no leakage path from the uid.

In U.S. Patent No. 3,132,525, there is described a drive device which consists of a tube which is restrained about its circumference at a location intermediate the ends of thetube. The input to the drive device consists of means for deforming oneend of the tube and means for rotating the deforrning means. The opposite end of the tube deorms into the same shape but always 90 degrees out of phase and a rotary output is `obtained from this other deforming end. In the present invention, one deformable end is located in a casing Vand the revolving of the deformation pattern moves the fluid when acting as a pump and is moved by the iluid when acting as a motor. Valve means are provided to separate the incoming and out--V going uid at one location about thedeformable end. By utilizing a solid diaphragm to support the tube intermediate the ends of the drive device, the uid system located 3,199,227 Patented June 22, 1965 ICC set forth above will become readily apparent from the accompanying description Vand drawings in which:

FIGURE 1 is a vertical section of the device ot the present invention showing the deformable tube and housmg;

FIGURE 2 is a transverse vertical section along line 2 2 of FIGURE 1 showing the drive means for one end of the tube;

FIGURE 3 is an end elevational view along line 3 3 of FIGURE 1 showing the supply and discharge parts;

FIGURE 4 is a transverse vertical section along line 4 4 of FIGURE 1 showing the uid system end of the tube with its major axis in horizontal position;

FIGURE 5 is a transverse vertical section similar to FIGURE 4 with theV major axis displaced 45 degrees;

FIGURE 6 is a transverse vertical section similar to FIGURE 4 with the major axis of the tube end displaced 90 degrees;

FIGURE 7 is a transverse vertical section similar to FIGURE 4 with the major axis of the tube end displaced f 120 degrees; and

The present invention has the abil- Y at one end of the tube can be keptcompletely separate t from `the drive mechanism at the other tube end Without Another object of the invention is to provide a fluid device usable as a pump or motor and which utilizes a ilexible tube with ends deformable 90 degrees out of phase, one end being the drive member and the other end coacting with the fluid. Y

Another object of the invention is to provide avuid device in which the driven member is located external of the fluid system and in which no through shaft or dynamic seals are required. l

Another object of the invention is to provide a positive displacement pump or motor in which the volume ow rate is constant with annular position change.

These and other objects of the invention not specically FIGURE 8 is a perspective view of the deformable tube and supporting diaphragm.

Referring to the embodiment of the invention chosen for purposes of illustration, the liuid device consists of a casing 1li located in opening 11 of confinement wall 12. The casing comprises a head section 13 which has an internal shoulder 14 receiving a projecting portion 19 on intermediate casing member 15. The member 13 has a side 16 which defines one side of a cavity 18 and the opposite side is delined by side 17 of the intermediate member 15. The opposed annular sides 16 and 17 are tapered away from'each other to give the cavity 1S an arc shaped cross section. Y

A support member 20 is secured to the containment Wall 12 by means of weld 21, and a sealing ring 22 is loeated between the wall `12 and the support member 20 to prevent leakage from the :left side of the wall `12. An annular projection 23 ion member Ztl engages a ledge 24 on intermediate member yl5 in yorder to Vlocate and support the t intermediate member 15' and the outer head member 13. An opposite annular projection 2.6 engages the interior of `a foot 27 on an end member 30 which has an internal by bolts, or welds, or the like.

The intermediate portion of support member 2d is reduced toform a cylindrical diaphragm 33 which is continuous and provides a uid tight lbarrier between opposite sides of the support member 2d. Formed integrally with barrier 3S is a flexible,` thin walled tube 39 having equal portions 40 and 41 on opposite sides of the barrier. The portion 41 is located in the cavity 18 between the head member 13 and intermediate member 15 and the enddtl is located within the cavity 31 of the end memberlll.

lThe inner ends 43 and 44 of casing members 13 and 1 5,

respectively, are located adjacent the `barrier 33 at its connection with the end 41 of the tube'39. l

The Vdrive shaft 46 of motor 34 has a splined end 47 which is Vinsertable into the spline interior of a shaft 4S located in cavity 32. The shaft 48v is supported by bearings 49 and Sti which are separated iby a spacer 51. The shaft 4S has an enlarged end 53 which is shaped in the f ormof an ellipse and this enlarged end carries an elliptical shaped `ball bearing comprising a tix/ed inner race 54 which is 4held on shaft end 53 .by retainer ring 52 and supports balls S5. The outer race 56 for the balls 5S is flexithe minor axis. v

ble and is located within the open end ,of tube portion 40 Y y so that the end dtla'of portion 40 will assume an elliptical shape similar to end 53. As the `end .53; is rotated, theV major axis ofthe ellipse of the tubeend 46a `will follow the rotation of the major axis of the elliptical endV 53'ofV` the shaft 48. In FIGURES l and 2, the major axis of the end 53 is shown in vertical positionand theend 40a of theportion 4t) assumes an elliptical shape in which its Y major elliptical axis is in line with the majoraxis of the end ss. AS disclosed in Us. Patent 3,132,525,111@ tube 39 supported by the barrier 38 has the property thratras the major axis A of the end da of the tube portion et) is rotated, the major axisB of end 41aof the tir-be Vportion 41 will rotate at the same rate but will remain 90 degrees yout of phase Vand the end 41a will assuniefthe same elliptical s-hape as the euddtl'a (seeFIGURE V8). f

The drive motor 34 provides rotary motion for the Vel-V liptical shaft'end 53 and as the elliptical inner race rotates,

the flexible outer race 56 Vis caused to deflect soY as to change the annular position ofthe maior. axisY of end 4tlg such that it always remains coherent Iwith the elliptical axis of the end 53j Y As themajor axis of the-end 53 is rotated, the shape of opposite end 41a of the tube .follows the shape of driven end 49a with aphase lag of 90 degrees.Y Also, asV

the `end 40a is moved through rotation of the end 53, the end 41a moves/back and forth in the tapered cavity 18. The surface 17 is positioned to match the outer surface of the tube portion 41 at the major axisand the surface 16 is shaped to matchthe outer surface of the tube portion at Inlet andfoutletV fluid passages VV613 and 61,k respectively,

extend from casing 1@ and` connect with enlarged spacesV 62 and 63, respectively, communicating with the cavity 18 and located in the `wall of the head member 13., A divider plate V65 4is located ina slot 66 in memberV 15 extending Y upwardly from the cavity 18 and -the plate 65 is continu-Y ously biased against the surface of tube portion 41 byV means of a spring 67 located bet-Ween'the plate and the i bottom surface 68 o-f theslot. Also, an inner divider plate '70 is located in a slot 71 in member 13 opposite to the slot 66 and is vheld against the inside surface-of the tube portion 41 by means of a spring 72located betweent-he plate 70 and the bottomsurface 73 of the slot'. As illustrated in FIGURE 3, -the supplyfport 62 is Ypositioned directlyV to the right of the dividerl plates and the discharge port 63 is place an impervious barrier' across the cavity 18 along the length of portion 75. As illustrated in -FIGURE 3,7`the tube portion 41 divides the cavity spaces 76, 77, 78, and 79.

The operating principle of the fluid 12% into four separated y 4 tated 90 degrees from tion. The inlet of tuidk into the space 76 'to the right of Y barrier 65 is about to cease while the inlet of iluidinto the located directly to the left of the divider plates. As the end 41a of the tube has its major axis rotated, the dividerl plates 65 and 70 will continually bearon opposite sides of the linear portion 75of the tube in `order to continually purnpfthroughV the discharge port.

space 79 to the right of barrier 76 is increasing. Also, the space 77 is moving around towards the outlet63 and' the space 78 has justV commenced to discharge through theV outletport 63 to theleft of barrier 65. The fluid in the space 79 to the left of the barrier continues todischarge through outlet 63 as itis squeezed between the tube portiontil,

the barrier andthe surface 16 ofpmernber 13. In `FIG-V URE 7, the major axis has rotated 120 degreesfrom its position in FIGURE 4 `and the barriers areinan inter,- i

mediate position. The space 79 to the4 left of barrier 70 has substantially discharged the nid while the space 7 9 to.

the rightV orf the barrier isrstill receiving fluid. Thespace 78 to the lef-t of the barrier 65 is continuing to discharge through outlet 63while the space 78 to the right of barrierv 65 Vis lbeginning lto -takein fluid. The iiuid Vtrapped in spaces '7-6and 77 continue to'move toward the discharged l Aport 63 where the fluid in space 77V 'will be discharged by the reduction of the space to the left of barrier 7l) inthe same manner asV shown Vin' FIGURES 5 and 6 for space 79.

Also, the fluid in Vspace 76 :will againbe pumped through outlet 63 bythe reduction in space to the left of the barrier spaces tothe left `of the barriersreduce as continued rotationY of the major Vaxis continues .thereby forcing t-he iluid from the spaces out the discharge of port` 63. Thus, a

positive pumping action is obtained by the continual clockwise rotation of the major axis of the end portion 41v of the,

flexible deformable tube V39. As the volume of each of the spaces exposed tothe supply' port increases and draws `fluid intothe pump, the volume exposed'to `the discharge port is continually f lec'reasin'g'V and forcing fluid out of the In `the event it isdesired to utilizeY the fluid device` as a Vgenerator instead of a pump, lpressure fluid that ,would be introduced to the passage 63to act on the portion 41 of vthe tube to cause the major axis .to rotate in acounterf:

clockwise direction and the fluid would be discharged toa low pressure outlet passage 62.. Atthe same time, the major axis A of the end 40a would be caused to rotate .by the rotation ofrmaior axis B and would drive, the elliptical end 53 of shaft 52`therebfy rotating the shaft 46' ofdevice l 34 which woulclbe in the form Yof a generator rather `than Y device4 when operating as a pump is illustrated in FIGURES 4, 5, 6,1and 7.

Referring to FIGURE 4, the major axis B ofthe elliptical Y y end 41a ofthe tube is shown as horizontal and the barriers s 65 and 70 are in the lowest vposition with tube portion 75 located at surface 16.` Insuch condition, uid isfflowing fromV inlet port 62 into the spaces 76 Vand 77 toY theright ofthe barriersfS and 70. At the same time fluid is being f forced through the outlet port fromthe space 76to the left of barrier and from thespace 79 to the leftV of A barrier 7 i?. The directions of iiuid ow in Veach case is indicated by the arrows. f After 45 degrees of clockwise rota-` tion of the major axis ofthe end 41a (seeFIGURE 5), the barriers assume an intermediateY positionwherein duid;`

continues'to'enter the. space 76 to the right ofbarrier 65 "from port 62 and substantially all ofthe uid in the space F76 to the leftofgbarrier sha'sjlbeen discharged through opening'63. Also,rthe uid in space 79't'o thededt 0f barrier 79 is commencing to enter the'outllet passage 63; The i fluid in spaces 77 and 7S is being .movedY alongthrough Y lthe Vcavity 18 by lthe rotation kof, the majorgaxis B. e. Re iferring to FIGURE 6, the major axis of -end41ahas roa motor. Y Y. Y Y The device is of the positive displacement type whereby the volume ow rateY is constant with Yannular position change so that a steady, nonpulsiveow'will 1result'when acting as a pump and a steady generating force will result when actingras aV generator. .The device has Vthe ability to 'i pump hazardous iiuids and utilize power from hazardous Y uids which would berlocated withinrthe connementwalll Y 12 and completely separated from/the generator tor, motor `end of the device bythe continuous diaphragm.38.1 WhileV fthevdriverdevice oflPatent No. 3,132,525 could -be connectedby a separate drive means to a pump located beyond wall 12,:.the present invention providesfapumpingV action. directly from Vone' deformedend of the deformabletube so thatan intermediate drive 'is not necessary. The'construc, tion of the casing Ycoinponentican be varied to produce a` f suitable enclosure and the elliptical drive cau lbe modified by the-use of large rollers rather than ball bearings; `Var.- Y ious other modifications Yare contemplated by those skilled "in thel Yart'without departing from the spirit and scope of the. inventionasfhereinafter deiined :by the appended` claims.' l

FIGURE into vertical position and the barriers -65 and 70Y are in their luppermost posi- Y Y What is claimed is: 1. A uid device comprising: a deformable tube supported by a diaphragm about its periphery at a location intermediate t-he ends thereof, said diaphragm separating said tube into irst and second end portions terminating in first and second tube f ends;

the deformation of said rst end portion resulting in the same deformation of said second end portion bu with a phase difference of 90 degrees;

rotatable drive means having a deformed drive member located within said first end of said first tube portion for progressively deforming said rst end portion;

.uid cavity means receiving said second end portion of said tube while said second end portion is deformed during deformation of said irst end;

said -uid cavity means having movable barrier means for blocking said cavity at one location while permitting said second end portion of said tube to detorm; and

inlet and outlet ports located adjacent to and on opposite sides of said barrier means for controlling fluid ow through said cavity means.

2. A device as defined in claim 1 wherein:

said drive means comprises an elliptically shaped drive member; and

means located between said drive member and said one tube end for shaping said one tube end into an elliptical shape.

3. A device as dened in claim 1 wherein:

said shaping means comprises a rigid bearing race carried by said drive member and a exible bearing raceV carried by said first end of said tube. 4. A device as defined in claim 1 wherein said barrier means comprises:

transverse slits on opposite sides of said cavity; a first barrier located in one of said slits; a second barrier opposite said rst barrier and located in the other of said slits; springs means for maintaining said rst and second barriers in contact with said second tube end portion. 5. A fluid device as defined in claim 1 wherein said cavity for said second end portion extends along the length of said second portion and terminates at said barrier, said cavity being annular and having a cross section dened by a segment of a circle having a radius equal to the length of said second tube portion; the inner end of said cavity being sealed by said barrier,

6. A device as defined in claim 1 .wherein said die phragm is integral with said tube and extends completelyv through said tube to seal said cavity from said drive means.

7. A uid device comprising:

5 a deformable tube supported by a diaphragm about itsV periphery at a location intermediate the ends thereof so that the deformation of the tube portion on one side of said diaphragm results in the Same deformation of the tube portion on the other side of said diaphragm with a phase diiference of 90 degrees;

drive means having a deformed drive member in contact with said tube portion on said one side;

uid cavity means receiving said tube portion on said other side; v

barrier means 'for continually blocking said cavity at one location while permitting said tube portion on said other side to deform therein; and

inlet and outlet ports located adjacent to and on opposite sides of said barrier means for controlling fluid :dow through said cavity means.

3. A fluid device as dened in claim 7 wherein:

said drive means comprises a motor for rotating said drive member to continually deform said tube portion on said one side; and

drive References Cited by the Examiner UNirED STATES PATENTS Re. 23,992 5/.55 Cornelius 10S-133 2,451,603 10/48 Bar-ker 103-130 2,849,962 '9/'5-8 Musser 103-149 2,910,006 10/59 Musser 1034-449 2,073,250 l/ 63 Musser 103-117 3,132,525 5/64 Davids 74-17.8

JQSEPH BRANsoN, IR. Primary Examiner,

the phase deformation of sai-d tube portion on said other 

1. A FLUID DEVICE COMPRISING: A DEFORMABLE TUBE SUPPORTED BY A DIAPHRAGM ABOUT ITS PERIPHERY AT A LOCATION INTERMEDIATE THE ENDS THEREOF, SAID DIAPHRAGM SEPARATING SAID TUBE INTO FIRST AND SECOND END PORTIONS TERMINATING IN FIRST AND SECOND TUBE ENDS; THE DEFORMATION OF SAID FIRST END PORTIONS RESULTING IN THE SAME DEFORMATION OF SAID SECOND END PORTION BUT WITH A PHASE DIFFERENCE OF 90 DEGREES; ROTATABLE DRIVE MEANS HAVING A DEFORMED DRIVE MEMBER LOCATED WITHIN SAID FIRST END OF SAID FIRST TUBE PORTION FOR PROGRESSIVELY DEFORMING SAID FIRST END PORTION; FLUID CAVITY MEANS RECEIVING SAID SECOND END PORTION OF 